Incandescent light.



R. D. CODY.

INCANDESGENT LIGHT. y APPLICATION FILED DB0. 4, 1908.

Patented May 17, 1910.

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R. D. CODY, INGANDESCENT LIGHT. APPLIOATION FILED 1320.4, 1908.

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Patented May l?, 19M).

ROBERT D. CQDY, OF CHICAGO, ILLINOIS.

INCANDESCENT LIGHT.

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Specification of Letters Patent.

Application filed December Il, 1908.

Patented May 17, 1910.

Serial No. 465,953.

To all whom t may concern:

Be it known that I, ROBERT D. CoDY, a citizen of the United States, residing at the city of Chicago, in the county of Cook and State of Illinois, have invented a new and useful mprovement in Incandescent Lights, of which the following is a specification.

My invention relates to that class of lighting apparatus, in which a refractory mantle is heated to incandescence by a Bunsen fiame. The effectiveness of this method of lighting is much increased when the mantles are inverted, thus giving an unobstructed field of illumination. But the advantage of inverted burners used together has not been found heretofore to be proportionate to their number as compared with a single mantle light.

By means of my improvements l am able to overcome the defects heretofore developed in this method of lighting. Among other things which contribute to this result; the fiow of gas is completely regulated at its entry to the burner tube and provision is made for adapting the apparatus to diderent pressures and qualities of gas; an effective draft is provided for removing the combustion products; the atmospheric air is highly heated before being conducted to the burners, whereby more economical consumption of gas is effected, and the mantles are shielded from sudden changes of temperature and their life thereby prolonged.

My invention further provides various conveniences in the construction and arrangement of the parts, whereby the cost is reduced, the regulation thereof simplified, and the whole apparatus made more convenient and efficient.

The principles of my invention are illustrated in the drawings, in which:

Figure 1 is a view of my apparatus partly in section; Fig. 2 is a sectional view of the same on the line 2-2 of Fig. l; Fig. 3 shows the sleeve which forms a part of the heating chamber removed from the other parts of the apparatus; Fig. 4: is an enlarged sectional view of the gas regulating and mixing apparatus; Fig. 5 is a section on the line 55 of Fig. 4; Fig. 6 is a sectional plan view of the air regulating cap; Fig. 7 is a perspective of the upper portion of the Bunsen tube.

Further describing my invention with reference to the drawings, 1 represents a pipe through which gas controlled by the valve 5 is carried to the lamp. The lower part of said tube is connected to a link, which comprises the members 2-2. One of said members has a hollow portion 3 which is connected to the pipe 1, by the head 4;. An opening in the hollow part of the link admits the gas valve 5, provided with the seat 6 and the additional openings 7, if desired. A valve stem 8 is in operative relation to the seat G and provided with the knurled head 9 for adjustment as desired. The valve opening or openings are directed downward and in alinement with the Bunsen tube 10, which may be movably supported in the lower head 11 of the connecting link. Said tube is provided with the slots or openings 12, and a cap, an underview of which is shown in Fig. 6, is fitted thereover. Said cap has the body portion 13 and a central sleeve 14 provided with slots 15 corresponding with the slots in the Bunsen tube. The opening in the upper part of the cap is adapted to receive the lower part of the valve 5 and make a close and dust-proof connection, while the partial rotation of said cap provides a means by which, as the slots come into more or less complete registration, the flow of air to the Bunsen tube may be controlled. The Bunsen tube is continued downwardly and the lower end thereof secured in the head 16 from which are downwardly extended the tubes 17, to the lower ends of which are attached the mantles 18.

The burner tubes are protected against heat and warping by sleeves 19 and a subflame, which may be constantly kept burning is provided for in the telescoping or adjustable tube 20, which is attached at the source of gas supply 21 above the valve 2. A casing for the light, comprising the metallic body 25 and the globe attached to the lower part thereof, incloses the lighting apparatus. The body portion 25 is provided with air inlet openings 27 and outlet openings 28. lNithin the lamp casing is inclosed a sleeve shown in Fig. 3. The upper portion 29 ts snugly within the casing 25, and the lower portion 30 flares outwardly to form a flange, the edges 31 of which are in close proximity to the globe 26 and provide an annular passage 32 between said edges and the globe. It will also be seen that an annular chamber 33 is formed between the neck and flange of said sleeve last described and the adjacent portions of the lamp casing. By the construction shown the mantles are completely inclosed and protected from draft in a highly heated chamber. The air to feed the combustion at the burners enters through the openings 27 into the adjacent chamber 33 when it is heated and then passes at a high temperature to the burners. From there it is carried upwardly with the com` bustion products by the natural draft of the lamp, and discharged through the outlet openings 28. No air can come in contact with the inantles except through the heating chamber or the regulating apparatus. rIhe latter is thoroughly protected from dust, and the gas valve and outlet are adjusted to meet the conditions of different qualities and pressures of gas.

I claim:

l. In a Bunsen apparatus; a feed pipe, a mixing tube, a link to connect the feed pipe and the mixing tube and comprising two spaced arms connected at the ends by hollow heads, one of said arms provided with a hollow portion in communication at its upper end through the upper hollow head with the feed pipe, and a valve offset from said hollow portion adjacent its lower end to direct gas into the mixing tube.

2. In a Bunsen apparatus; a feed pipe, a mixing tube, a link to connect the feed pipe and the mixing tube and comprising two spaced arms connected at the ends by hollow heads, one of said arms provided with a hollow portion and adapted to hold them in adjustable relation, and a valve oflset from said hollow portion adjacent its lower end to direct gas into the mixing tube.

3. In a Bunsen apparatus; a feed pipe, a mixing tube provided with a slotted upper end, and a cap member provided in its top with a multiplicity of outlet openings to conduct gas from the feed pipe and direct it into the mixing tube and having a sleeve iitting on the slotted upper end of the mixing tube and provided with openings.

4. In a Bunsen apparatus; a feed pipe, a mixing tube provided with a slotted upper end, a cap member provided in its top with a central outlet aperture, and a multiplicity of apertures spaced therearound, a sleeve fitted on the slotted upper end of the mixing tube and provided with openings, and means for controlling the How of gas through the central aperture.

5. In a Bunsen apparatus; a feed pipe, a mixing tube, a branched link to connect the feed pipe and the mixing tube, one of the branches of said link having a hollow portion, a member between the branches of the link communicating with the hollow portion and provided with an outlet opening to direct gas into the mixing tube, and a valve stem alined with the mixing tube to control the said gas outlet opening.

6. In a Bunsen apparatus; a mixing tube having openings about its end, a feed pipe, a cap for the mixing tube having a perforated top adjacent to the feed pipe and provided with a central sleeve having openings corresponding to the openings about the end of the mixing tube, and a link connecting the feed pipe and mixing tube, said link having a hollow portion through which communication between the feed pipe and mixing tube is established.

7. In combination with a lamp casing; a group of inverted incandescent burners, and a sleeve placed in the casing and provided at each end with an annular flange, the flange at the upper end of the sleeve engaging with the inner wall of the casing and being secured thereto, and the flange at the lower end of the sleeve flaring outwardly and adapted to form with the adjacentparts of the casing an annular air heating chamber.

In witness whereof, I have hereunto set my hand, this seventh day of October A. D. 1908, in the presence of two subscribing witnesses.

ROBERT D. GODY. Vitnesses W. MURRAY, C. KENNEDY. 

